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How United Kingdom ranks worldwide on dormant space, the transfer market, routing security and address density.
PeeringDB-registered presence.
APNIC-measured end-user deployment.
Clean prefixes (valid RPKI + IRR, no mismatch).
Cumulative IPv4, IPv6, and ASN allocations to United Kingdom over time.
The largest autonomous systems registered to United Kingdom by IPv4 footprint.
United Kingdom against its land-border neighbours on IPv4, IPv6, AS numbers and per-capita density.
Share of announced address space covered by valid Route Origin Authorizations.
3,123 autonomous systems registered to United Kingdom. Click an AS for detail.
| AS5378GB | Vodafone Limited | 2.8M | 24 |
| AS6871GB | Plusnet British Telecommunications PLC | 2.1M | 64 |
| AS8220GB | COLT COLT Technology Services Group Limited | 1.5M | 170 |
| AS206067GB | H3GUK Hutchison 3G UK Limited | 1.1M | 336 |
| AS212238GB | CDNEXT Datacamp Limited | 983K | 4,036 |
| 81.4K |
| 655.4K |
| 72 |
| AS60187GB | LGFL-AS London Grid for Learning Trust | 81.7K | 786.4K | 49 |
| AS2818GB | BBC BBC | 81.9K | 196.6K | 7 |
| AS61323GB | UKFAST ANS ACADEMY LIMITED | 82.4K | 589.8K | 65 |
| AS48101GB | TROOLI-AS Trooli Ltd. | 82.7K | 459K | 73 |
| AS29550GB | SIMPLYTRANSIT Team Blue Carrier Limited | 85K | 65.5K | 12 |
| AS24867GB | Adapt-AS Rackspace Ltd. | 86.3K | — | 14 |
| AS31515GB | AS-INMARSAT Inmarsat Global Limited | 87.6K | 65.5K | 55 |
| AS21267GB | Wavenet-AS21267 Wavenet Limited | 89.9K | 65.5K | 65 |
| AS42973GB | METRONETUK_M24SEVEN Convergence Group (Wireless) Networks Limited | 96K | — | 63 |
| AS214143GB | skydigital-telecom SKYDIGITAL TELECOM LTD | 96.3K | — | 268 |
| AS25160GB | VORBOSS Vorboss Limited | 97K | 1.6M | 37 |
| AS58065GB | PacketExchange Orion Network Limited | 97.3K | 7 | 384 |
| AS5503GB | RMIFL RM Education Ltd | 99.3K | 65.5K | 41 |
| AS12701GB | BARCAP Barclays Bank plc | 99.6K | — | 31 |
| AS16247GB | M247-UK Convergence Group (Wireless) Networks Limited | 100.4K | 98.3K | 231 |
| AS41354GB | its-tg ITS Technology Group Limited | 102.9K | 528.4K | 44 |
| AS39326GB | HSO-GROUP Syntura Group Limited | 103.7K | 131.3K | 33 |
| AS21433GB | AccentureFSSC Accenture UK Limited | 104.7K | 162 | 426 |
| AS44574GB | A4N Network Services Ltd. | 106.2K | 524.3K | 28 |
| AS49758GB | LLOYDSBANKING Lloyds Banking Group PLC | 106.5K | — | 8 |
| AS8586GB | OBSL-AS TalkTalk Communications Limited | 108K | 65.5K | 17 |
| AS56329GB | GIGACLEAR Gigaclear Limited | 110.6K | 1.1M | 34 |
| AS6908GB | DATAHOP Six Degrees Technology Group Limited | 112.9K | 786.4K | 48 |
| AS25369GB | BANDWIDTH-AS Hydra Communications Ltd | 121.1K | 655.9K | 224 |
| AS5587GB | ITILITY-LIMITED Itility Limited | 121.9K | 524.3K | 14 |
| AS41230GB | ASK4 ASK4 Limited | 122.1K | 3.7M | 23 |
| AS60068GB | CDN77 Datacamp Limited | 125.7K | 19.2K | 487 |
| AS8651GB | MUSI MUFG Securities EMEA PLC | 131.1K | — | 9 |
| AS209237GB | NPL-MANG-LTD NPL Management LTD | 131.6K | — | 4 |
| AS42831GB | UKSERVERS-AS UK Dedicated Servers Limited | 132.9K | 721.2K | 340 |
| AS198864GB | QMW-AC-UK Queen Mary University of London | 132.9K | 65.6K | 7 |
| AS21054GB | UK-NATWEST-AS21054 Natwest Markets PLC | 134.4K | — | 13 |
| AS13213GB | UK2NET-AS THG HOSTING LIMITED | 140.5K | 33K | 190 |
| AS15404GB | COLT Technology Services Group Limited | 147.5K | 69.6K | 161 |
| AS20712GB | AS20712 Andrews & Arnold Ltd | 147.7K | 86K | 93 |
| AS47474GB | Virtual1 Virtual1 Limited | 153.3K | 65.5K | 17 |
| AS12703GB | PULSANT-AS Pulsant (Scotland) Ltd | 180K | 458.8K | 65 |
| AS8607GB | TIMICO Digital Space Group Limited | 205.6K | 720.9K | 24 |
| AS56478GB | BCUBE-AS Hyperoptic Ltd | 219.1K | 77.8K | 98 |
| AS25310GB | ASN-CWACCESS Vodafone Limited | 229.4K | — | 4 |
| AS201838GB | ASN-COMMUNITYFIBRE Community Fibre Limited | 238.3K | 1.1M | 104 |
| AS12390GB | KINGSTON-UK-AS KCOM Group Limited | 260.1K | 131.1K | 20 |
| AS8698GB | NATIONWIDE BUILDING SOCIETY | 262.1K | — | 109 |
| AS35228GB | O2BROADBAND Telefonica UK Limited | 283.1K | 67.1K | 122 |
| AS15914GB | British Airways plc | 288.3K | — | 95 |
| AS25180GB | EXPONENTIAL-E-AS Exponential-E Ltd. | 293.1K | 593.9K | 48 |